SQL Server Windows NT 64 bit Sudden High CPU Spike

I am facing a strange behavior of my SQL Server 2016 web edition. SQL Server Windows NT 64 bit suddenly jump to use 90% of the CPU and then it goes down after 5 sec, then the spike comes again after 3 to 5 mins (normal usage is just aroud 2% to 5% of cpu)

My server specs

• Windows Server 2012 R2 Standard Evaluation (9600 build)

• MS SQL Server 2016 Web

• Intel Xeon E3-1245v5

• 64GB DDR4 ECC (2400 MHz)

• 3x480 GB SSD (Micron)

Server is up to date with latest updates installed and MS SQL Server is on default settings.
How can I find what is causing this. Please help me. Thanks

Please check the screenshots

There are a few ways to approach this.

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Download sp_WhoIsActive and run it when you notice a CPU spike, or log it to a table and query the table looking at the CPU column (maybe ORDER BY CPU DESC).

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Examine the plan cache using a free script -- I co-author one called sp_BlitzCache. By default, it will return the top 10 CPU consuming queries in your server's plan cache.

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Buy a monitoring tool like SentryOne Performance Advisor and use it to examine your server during a spike.

StackExchange Database Administrators Q#173519, answer score: 6